refactor to use listcomp, also do oneliner, also do ruby

06/06.rb

@@ -0,0 +1,17 @@
+require 'set'
+
+groups = File.read("input.txt").split("\n\n")
+
+puts groups
+	.map{|g| g.gsub("\n","")}
+	.map{|g| g.chars}
+	.map{|a| a.to_set}
+	.map{|s| s.size}
+	.reduce(0, :+)
+puts groups
+	.map{|g| g.split("\n")}
+	.map{|g| g.map{|a| a.chars}}
+	.map{|a| a.map{|a| a.to_set}}
+	.map{|s| s.reduce(:&)}
+	.map{|s| s.size}
+	.reduce(0, :+)

06/06_minimal.py

@@ -0,0 +1,8 @@
+with open("input.txt","r") as f:
+	groups = f.read().split('\n\n')
+print(
+	(
+		sum(map(len, [set(list(group.replace('\n',''))) for group in groups])),
+		sum(map(len,[set.intersection(*map(set, map(list,group.split('\n')))) for group in groups]))
+	)
+)

06/06_refactored.py

@@ -0,0 +1,21 @@
+def read_file():
+	with open("input.txt","r") as f:
+		return f.read().split('\n\n')
+
+def part1(groups):
+	"""Anyone"""
+	groupsets = [set(list(group.replace('\n',''))) for group in groups]
+	return sum(map(len, groupsets))
+
+def part2(groups):
+	"""Everyone"""
+	allset = [set.intersection(*map(set, map(list,group.split('\n')))) for group in groups]
+	return sum(map(len,allset))
+
+def main():
+	groups = read_file()
+	print(f'{part1(groups)=}')
+	print(f'{part2(groups)=}')
+
+if __name__ == "__main__":
+	main()